We report measurements of the inclusive transverse momentum (p(T)) distribution of centrally produced K-S(0), K-*perpendicular to (892), and phi(0)(1020) mesons up to p(T) = 10 GeV/c in minimum bias events, and K-S(0) and Lambda(0) particles up to p(T) = 20 GeV/c in jets with transverse energy between 25 and 160 GeV in p (p) over bar collisions. The data were taken with the CDF II detector at the Fermilab Tevatron at root s = 1.96 TeV. We find that as p(T) increases, the p(T) slopes of the three mesons (K-S(0), K-*+/-, and phi) are similar. And using our previous Lambda(0) results from minimum bias events, we show that the ratio of Lambda(0) to K-S(0) as a function of p(T) in minimum bias events becomes similar to the fairly constant ratio in jets at p(T) similar to 5 GeV/c. This suggests that the particles with p(T) * 5 GeV/c in minimum bias events are from "soft'' jets, and that the p(T) slope of particles in jets is insensitive to light quark flavor (u, d, or s) and to the number of valence quarks. We also find that for p(T) & 4 GeV relatively more Lambda(0) baryons are produced in minimum bias events than in jets.

Production of K-S(,)0 K-*+/- (892) and phi(0) (1020) in minimum bias events and K-S(0) and Lambda(0) in jets in p (p)over-barcollisions at root S 1: 96 TeV

MORELLO, MICHAEL JOSEPH;
2013

Abstract

We report measurements of the inclusive transverse momentum (p(T)) distribution of centrally produced K-S(0), K-*perpendicular to (892), and phi(0)(1020) mesons up to p(T) = 10 GeV/c in minimum bias events, and K-S(0) and Lambda(0) particles up to p(T) = 20 GeV/c in jets with transverse energy between 25 and 160 GeV in p (p) over bar collisions. The data were taken with the CDF II detector at the Fermilab Tevatron at root s = 1.96 TeV. We find that as p(T) increases, the p(T) slopes of the three mesons (K-S(0), K-*+/-, and phi) are similar. And using our previous Lambda(0) results from minimum bias events, we show that the ratio of Lambda(0) to K-S(0) as a function of p(T) in minimum bias events becomes similar to the fairly constant ratio in jets at p(T) similar to 5 GeV/c. This suggests that the particles with p(T) * 5 GeV/c in minimum bias events are from "soft'' jets, and that the p(T) slope of particles in jets is insensitive to light quark flavor (u, d, or s) and to the number of valence quarks. We also find that for p(T) & 4 GeV relatively more Lambda(0) baryons are produced in minimum bias events than in jets.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11384/38634
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